Protective fuse



Patented Mar. 28, |899,

E. B. vw. nElcHEL. PROTECTIVE FUSE. (Application med sept. 29,' i898.)

2 Sheets--Sheet I.

(No Model.)

h'fiiesses;

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No. 622,075. APatented Mar. 28, |899. E. B. W. REICHEL.

PROTECTIVE Fuse.

(Application led Sept. 29, 1898.) (No Model.) 2 Sheets-Sheet 2.

UNITED STATES PATENT OEEICE.

EMIL BERTIIOLD IVALTER REICIIEL, OF BERLIN GERMANY, ASSIGNOR TO THE SIEMENS di HALSKE ELECTRIC COMPANY OF AMERICA, vOF

onioneo, ILLINois.

PROTECTIVE FUSE.

`SPECIFICATION forming part 'of Letters Patent No. 622,075, dated March 28, 1899. Application tiled September 29, 1898. Serial Noi 692,167. (No model.)

To @ZZ whom, t may concern:

Beit known that I, EMIL BEETHOLD WAL- TER REIGHEL, a subject of the Emperor of Germany, residing at Berlin, Germany, have invented a certain new and useful Improvement in Protective Fuses, (Case No. 161,) of 'which the following isa full, clear, concise, and exact description.

My invention relates to fuses, and has for :its object the construction of a fuseemountin g, in combination with cooperating parts, whereby the arc resulting when the fuse is blown is limited in its travel.

Spring mechanism is preferably employed for placing insulating-blocks within the path of the arc to limit its travel, the apparatus ,being so constructed that the terminals of the fuse and the spring mechanism for operating the aforesaid blocks are thoroughly protected from the arc. I surround that portion of the fuse liable to be blown out by a tubular wall composed, preferably, of insulating material, the terminals of the fuse being upon the exterior of the wall, while the insulating-blocks for obstructing the progress of the arc are placed between that portion of the fuse which is initially destroyed and the terminals. Thus the terminals are thoroughly protected from the are and the resulting metallic vapor. I provide a protecting cover or cap for the fuse parts, which serves more thoroughly to protect the metallic parts,

the spring for actuating the insulatingblocks being preferably contained within protecting inclos'ures upon the interior of the cover. In order, therefore, to replace the fuse, it is only necessary to remove'the covers, whereupon the blocks may be readily withdrawn and the fuse inserted. y

I will describe my invention more particularly by reference to the accompanying drawings, which illustrate the preferred embodiment thereof.

Figure l is a side elevation, partially in section, of the structure of my invention, one wall ofthe cover being removed to reveal the interior mechanism. Fig. 2 is a crosssectional View on line 2 2 of Fig. l. Fig. 3 is a view in cross-seetion of the cover. Fig. e is a side elevation of the structure, the cover being removed.

Fig. 5 is an'elevation of the structure as shown in Fig. 4. Fig. G is aplan view of the structure as shown in Fig. l, certain parts being broken away. Figs. 7, 8, and 9 illustrate the fuse-'terminals that I prefer to employ. v

Like letters indicate like parts throughout the different views.

The fuse-terminals a a are preferablyin the form of spring-clips, as shown in Figs. 7, 8, and 9. The fuse b is provided with camshaped ends b', which when placed in a vertical position slip between the clips, handles Z22 being employed to turn the ends b into the position shown in Fig. 9, whereby a firm con? tact is made between the fuse and its terminals without the aid of bindingescrews. The terminals a a are" provided with extensions Cd a', which support binding-screws provided for the purpose of connecting the conductor to be protected with the fuse-terminals. The terminals are mounted upon an insulatingn base c, composed, preferably, of porcelain, this base in turn being mounted upon an insulating-base c.

I embed a square tubular portion c2 within the base c, this tubular portion being constructed, preferably,of reproo'f material, the fuse passing through the walls of the tube and being disposed in a plane practically at right angles to the bore of the tubea The tube has recesses c3 et. The recesses c3 receive the slides CZ d and extend below the fuse to be protected. The recesses c4 permit of the insertion of the fuse between the terminals a a. The slides d d preferably rest upon. the top of the fuse. The parts supported upon the base c' are protected by a cover e, the cover being provided with lugs e c2, which engage apertures f', provided in the-springs ff, carried by the base c'. Inclosing recep tacles g g are carried by the cover. Vithin these receptacles coiled springs h h are contained, the ends of the springs only projecting through slots to the center of the top portion 9 a fuse the cover is removed, the slides being at once relieved of: the springpressure, whereupon they may readily be removed. Those portions of the fuse which are engaged by the slides are preferably made thicker than the fuse portion between the slides, the arc frequently consuming only the thinner intermediate portion. It, however, the are should travel farther, the sprin gs 7L 7L will depress the slides into the lower portions of the recesses c3, the Jfurther travel of the arc toward the fuse terminals being thus effectually prevented. It will be noticed that by this construction all of the perinanently-placed metal entering into the construction of the fusemounting is thoroughly protected from the action of the arc.

It is obvious that changes may readily be made in the herein-described structure without departing from the spirit of the invention, and I do not, therefore, desire to be limited to the precise construction shown; but,

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The combination with a fuse connected between fuse-terminals, of abase forsupporting the terminals, a slide engaging the fuse, a cover for protecting the fuse parts, a spring carried bythe cover adapted when the cover is in place to engage the slide and exert thereon pressure, and an inclosing receptacle carried by the cover containing a portion of the spring, another portion of the spring extending through the receptacle and engaging the 5 slide, substantially as described.

The combination with a fuse connect-ed between fuse-terminals, of a base for support ing the terminals, a slide engaging the upper portion of the fuse, a cover 'for protecting the fuse parts, a spring carried by the cover adapted when the cover is in place to engage the slide and exert thereon pressure, an inclosing receptacle carried by the cover containing a portion of the spring, another portion of the spring extending through the receptacle and engaging the slide, and a tubular chamber through which the fuse passes, said chamberbeing provided with a recess for the slide, the said recess extending below the fuse, substantially as described.

3. The combination with a fuse connected between fuseterminals, of a base forsupporting the terminals, slides d (l engaging the upper portion of the fuse, a cover for protecting the fuse parts, springs 7L h carried by the cover adapted when the cover is in place to engage the slides and exert thereon pressure, inclosing receptacles for said springs carried by the cover, each containing a portion of the spring, another-portion of each spring extending through its receptacle and engaging its slide, and a tubular chamber through which the fuse passes, said chamber being provided with two recesses for the slides, said recesses extending below the fuse, substantially as described.

In witness whereof I hereunto subscribe niy name this 13th day of September, A. D. 1893.

EMIL lllli'lllOlil) lYL'll'lll lllliClllll..

Witnesses:

C. Il. DAY, W. HAUPT. 

